radiator fan always on: help

**mudspit** · February 27th, 2013 08:46 AM

newbie question po, madali po ba ipaayos yung wiring sa radiator fan, lagi kase sya nakabukas kahit close yung aircon.

mazda 3 po auto ko. Thanks

**jick.cejoco** · February 27th, 2013 09:37 AM

Originally Posted by mudspit

newbie question po, madali po ba ipaayos yung wiring sa radiator fan, lagi kase sya nakabukas kahit close yung aircon.

mazda 3 po auto ko. Thanks

is your airconditioner working properly? is your hi/lo pressure switch connected this is located near the firewall on the passenger side)?
. unplug and try connecting a 4 kilo ohms resistor between terminals of the coolant sensor terminal. this is located next to the thermostat housing

**jvnj** · February 27th, 2013 10:36 AM

Chief mudspit,

Either the engine coolant temperature sensor or the radiator fan relay are defective already. Have checked / replaced by a specialist.

**mudspit** · February 27th, 2013 11:23 AM

thanks sirs, aircon is working fine po, wala po ako alam talaga kase sa sasakyan. any idea po how much gastos dito? and aircon specialist ko ba dadalhin or electrician? sorry for such noob questions

**jick.cejoco** · February 27th, 2013 12:20 PM

Originally Posted by mudspit

thanks sirs, aircon is working fine po, wala po ako alam talaga kase sa sasakyan. any idea po how much gastos dito? and aircon specialist ko ba dadalhin or electrician? sorry for such noob questions

have the pcm scanned both cold engine and normal engine temperature while the engine is running, ask for the pcm readout of the engine coolant temperature sensor (ECT) if the sensor is not giving the right signal, the pcm goes into safe mode and runs the radiator fan continuously